期刊文献+
共找到371篇文章
< 1 2 19 >
每页显示 20 50 100
Electro-optical properties of high birefringence liquid crystal compounds with isothiocyanate and naphthyl group 被引量:1
1
作者 彭增辉 王启东 +7 位作者 王少鑫 姚丽双 刘永刚 胡立发 曹召良 穆全全 杨程亮 宣丽 《Chinese Physics B》 SCIE EI CAS CSCD 2017年第9期242-247,共6页
Liquid crystal(LC) compound with isothiocyanate and naphthyl group is an attractive high birefringence LC material,and can be used in optical devices. In this paper, the electro-optical properties of a series of thi... Liquid crystal(LC) compound with isothiocyanate and naphthyl group is an attractive high birefringence LC material,and can be used in optical devices. In this paper, the electro-optical properties of a series of this type of LC compounds were investigated. The melting points and enthalpy values of these LC compounds were higher than those of corresponding compounds with the phenyl group. These compounds exhibited high birefringence with a maximum value of 0.66. Fluorine substitution in the molecular almost does not affect the birefringence value. When these LC compounds with the naphthyl group were dissolved in a commercial LC mixture, the electro-optical properties depending on temperature were investigated. In the low-temperature region, LC mixtures with the naphthyl-group LC compounds exhibited higher viscosity than pure commercial LCs. In the high-temperature region, viscosity values very closely approached each other. When response performance was investigated, figure-of-merit(FoM) values were measured. The Fo M values of LC mixtures containing LC compounds with naphthyl group were lower than those of reference benzene LCs in the low-temperature region. However, in the high-temperature region, the results were reversed. These isothiocyanate LC compounds with naphthyl group can be applied in special fast-response LC device, particularly the ones used under high-temperature conditions. 展开更多
关键词 naphthalene isothiocyanate liquid crystals high birefringence electro-optical property
下载PDF
Creating a bionic scaffold via light-curing liquid crystal ink to reveal the role of osteoid-like microenvironment in osteogenesis
2
作者 Kun Liu Lin Li +8 位作者 Yizhi Li Yiting Luo Zhaoyu Zhang Wei Wen Shan Ding Yadong Huang Mingxian Liu Changren Zhou Binghong Luo 《Bioactive Materials》 SCIE CSCD 2024年第10期244-260,共17页
Osteoid plays a crucial role in directing cell behavior and osteogenesis through its unique characteristics,including viscoelasticity and liquid crystal(LC)state.Thus,integrating osteoid-like features into 3D printing... Osteoid plays a crucial role in directing cell behavior and osteogenesis through its unique characteristics,including viscoelasticity and liquid crystal(LC)state.Thus,integrating osteoid-like features into 3D printing scaffolds proves to be a promising approach for personalized bone repair.Despite extensive research on viscoelasticity,the role of LC state in bone repair has been largely overlooked due to the scarcity of suitable LC materials.Moreover,the intricate interplay between LC state and viscoelasticity in osteogenesis remains poorly understood.Here,we developed innovative hydrogel scaffolds with osteoid-like LC state and viscoelasticity using digital light processing with a custom LC ink.By utilizing these LC scaffolds as 3D research models,we discovered that LC state mediates high protein clustering to expose accessible RGD motifs to trigger cell-protein interactions and osteogenic differentiation,while viscoelasticity operates via mechanotransduction pathways.Additionally,our investigation revealed a synergistic effect between LC state and viscoelasticity,amplifying cellprotein interactions and osteogenic mechanotransduction processes.Furthermore,the interesting mechanochromic response observed in the LC hydrogel scaffolds suggests their potential application in mechanosensing.Our findings shed light on the mechanisms and synergistic effects of LC state and viscoelasticity in osteoid on osteogenesis,offering valuable insights for the biomimetic design of bone repair scaffolds. 展开更多
关键词 3D printing Digital light process liquid crystal hydrogel scaffolds high protein clustering Tunable mechanotransduction Synergistic osteogenesis
原文传递
Naphthylethyne based liquid crystals with high birefringence and characteristics of selective reflection
3
作者 Yu-Zhen Zhao Dong Wang +4 位作者 Ze-Min He Gang Chen Lan-Ying Zhang Hai-Quan Zhang Huai Yang 《Chinese Chemical Letters》 SCIE CAS CSCD 2015年第6期785-789,共5页
A series of high birefringence liquid crystalline molecules with cyano, isothiocyanato and trifluoromethyl terminal compounds based on naphthylethyne core was successfully synthesized and characterized. The molecular ... A series of high birefringence liquid crystalline molecules with cyano, isothiocyanato and trifluoromethyl terminal compounds based on naphthylethyne core was successfully synthesized and characterized. The molecular structures of the intermediates and resulting compounds were confirmed by Fourier transform infrared (FT-IR), nuclear magnetic resonance (NMR), mass spectrometry (MS), and elemental analysis (EA). Their thermal stability, transition temperatures, and phase sequences were investigated by simultaneous thermal analyzer polarized (STA), optical microscopy (POM) and differential scanning calorimetry (DSC). The birefringence was measured by using an Abbe refractometer. In addition, the selective reflection characteristics with naphthylethyne compounds were also studied. 展开更多
关键词 liquid crystal Naphthylethyne birefringence Selective reflection
原文传递
MECHANICAL PERTURBATION INDUCED MOLECULAR ALIGNMENTS IN A SIDE-CHAIN LIQUID CRYSTALLINE POLYACETYLENE, POLY{10-[4-(4'-METHOXYPHENOXY-CARBOML)PHENOXYCARBONYL]-1-DECYNE}
4
作者 Ben-zhong Tang Xiang-xing Kong Xin-de Feng Department of Chemistry, Hong Kong University of Science & Technology, Clear Water Bay, Kowloon, Hong Kong, China Department of Polymer Science & Engineering, College of Chemistry, Peking University, Beijing 100871, China 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 1999年第3期289-294,共6页
A new liquid crystalline polyacetylene containing a phenyl benzoate mesogen (5) is synthesized,whose mesomorphic properties are found to be easily 'tunab1e' by simple mechanical perturbation. Thepolymerization... A new liquid crystalline polyacetylene containing a phenyl benzoate mesogen (5) is synthesized,whose mesomorphic properties are found to be easily 'tunab1e' by simple mechanical perturbation. Thepolymerization of 10- [ 4 - (4' -methoxyphenoxycarbonyl )phenoxycarbonyl] - 1 -decyne (4 ) in itiated by theWCl_6-Ph_4Sn/dioxane complex yields polymer 5 with a M_w of 28400. The molecular structure of 5 ischaracterized by NMR, IR, and UV spectroscopy and its liquid crystalline behavior is investigated by DSC,POM, and XRD analysis. Upon mechanical perturbation, 5 exhibits unusual agitation-induced high-strengthdisclinations, shear-induced inversion walls, and solidification-induced banded textures. Such phenomenahave been observed in the main-chain liquid crystalline polymers with rigid backbones, but have seldom beenreported for the side-chain liquid crystalline polymers with flexible backbones, suggesting that the rigidpolyacetylene backbone of 5 plays a constructive role in inducing the novel molecular alignments. 展开更多
关键词 liquid crystals Side-chain liquid crystalline polymers POLYACETYLENES high-strength disclinations Inversion walls Banded textures Molecular alignments
下载PDF
An active coronagraph using a liquid crystal array for exoplanet imaging:principle and testing 被引量:1
5
作者 Xi Zhang De-Qing Ren +1 位作者 Yong-Tian Zhu Jiang-Pei Dou 《Research in Astronomy and Astrophysics》 SCIE CAS CSCD 2012年第5期591-600,共10页
High-contrast imaging coronagraphs, used for the detection of exoplanets, have always adopted passive coronagraph optical components. It is therefore impossible to actively optimize the coronagraphs to achieve their b... High-contrast imaging coronagraphs, used for the detection of exoplanets, have always adopted passive coronagraph optical components. It is therefore impossible to actively optimize the coronagraphs to achieve their best performance. To solve this problem, we propose a novel high-contrast imaging coronagraph which combines a liquid crystal array (LCA) for active pupil apodization and a deformable mirror (DM) for phase correction. The LCA we use is an amplitude-only spatial light mod- ulator. The LCA is well calibrated and compensates for its amplitude non-uniformity and nonlinear intensity responsivity. We measured the imaging contrasts of the coron- agraph system with the LCA only and without the DM deployed. Imaging contrasts of 10-4 and 10-5 can be reached at an inner working angular distance of 2.5 and 5A/D, respectively. A simulation shows that the phase errors on the coronagraph pupil limit the contrast performance. The contrast could be further improved if a DM is deployed to correct the phase errors induced by the LCA and coronagraph optics. 展开更多
关键词 instrumentation: coronagraph liquid crystal array - techniques high-contrast imaging exoplanet detection
下载PDF
COMPENSATION EFFECT OF POLYIMIDE THIN FILMS ON NORMALLY WHITE TWISTED NEMATIC LIQUID CRYSTAL DISPLAYS
6
作者 李宝忠 何天白 丁孟贤 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 1997年第2期139-145,共7页
The disadvantages of Normally White Twisted Nematic Liquid Crystal Display (NW-TN-LCD) were discussed. The reason that the negative birefringent polyimide thin films were used to compensate NW-TN-LCD to decrease off-a... The disadvantages of Normally White Twisted Nematic Liquid Crystal Display (NW-TN-LCD) were discussed. The reason that the negative birefringent polyimide thin films were used to compensate NW-TN-LCD to decrease off-axis leakage, improve contrast ratios and enlarge viewing angles was explained in this paper. A certain polyimide thin film was taken as an example to show compensation effect on NW-TN-LCD. 展开更多
关键词 polyimide thin films RETARDATION compensation negative birefringence normally white twisted nematic liquid crystal display
下载PDF
Optical Measurements of Thermotropic Liquid Crystals
7
作者 Tawfik A. El-Dessouki Mohammed Roushdy +2 位作者 Nabil I. Hendawy Magdi M. Naoum Ayman A. Zaki 《Journal of Modern Physics》 2013年第1期39-48,共10页
In this work, an experimental approach was used for measuring birefringence of thermotropic liquid crystal materials at different wavelengths in the visible region by using speckle interferometry. Also the values of t... In this work, an experimental approach was used for measuring birefringence of thermotropic liquid crystal materials at different wavelengths in the visible region by using speckle interferometry. Also the values of the refractive indices were measured for these thermotropic liquid crystal materials in isotropic and liquid crystal phases at different wave-lengths. Temperature dependency of the refractive indices for each LC sample at certain wavelengths was investigated in the isotropic and in LC phases. 展开更多
关键词 THERMOTROPIC liquid crystal INTERFERENCE birefringence SPECKLE PHOTOGRAPHY
下载PDF
Optical Measurements and Speckle Photography for Thermotropic Liquid Crystals Mixtures
8
作者 Ayman A. Zaki 《Journal of Modern Physics》 2013年第4期517-521,共5页
In this work, an experimental approach of speckle photography was used for measuring birefringence of thermotropic liquid crystals mixtures at different wavelengths in the visible region. Also the dispersion relations... In this work, an experimental approach of speckle photography was used for measuring birefringence of thermotropic liquid crystals mixtures at different wavelengths in the visible region. Also the dispersion relations were investigated. The values of the refractive indices were measured for these mixtures of thermotropic liquid crystals in isotropic and liquid crystal phase at different wavelengths. The effect of the end group of these LCs used on the values of birefringence was investigated and discussed. 展开更多
关键词 THERMOTROPIC liquid crystalS MIXTURES Interference birefringence SPECKLE PHOTOGRAPHY
下载PDF
Low dielectric constant and highly intrinsic thermal conductivity fluorine-containing epoxy resins with ordered liquid crystal structures
9
作者 Xuerong Fan Zheng Liu +1 位作者 Shuangshuang Wang Junwei Gu 《SusMat》 SCIE EI 2023年第6期877-893,共17页
Epoxy resins with a high dielectric constant and low intrinsic thermal conductivity coefficient cannot meet the current application requirements of advanced electronic and electrical equipment.Therefore,novel fluorine... Epoxy resins with a high dielectric constant and low intrinsic thermal conductivity coefficient cannot meet the current application requirements of advanced electronic and electrical equipment.Therefore,novel fluorine-containing liquid crystal epoxy compounds(TFSAEy)with fluorinated groups,biphenyl units,and flexible alkyl chains are first synthesized via amidation and esterification reactions.Then,4,4′-diaminodiphenylmethane(DDM)is used as a curing agent to prepare the corresponding fluorine-containing liquid crystal epoxy resins.The obtained dielectric constant(ε)and dielectric loss(tanδ)values of TFSAEy/DDM at 1 MHz are 2.54 and 0.025,respectively,which are significantly lower than those of conventional epoxy resins(E-51/DDM,3.52 and 0.038).Additionally,the intrinsic thermal conductivity coefficient(λ)of TFSAEy/DDM is 0.36 W/(m⋅K),71.4%higher than that of E-51/DDM(0.21 W/(m⋅K)).Meanwhile,the corresponding elastic modulus,hardness,glass transition temperature,and heat resistance index of TFSAEy/DDM are 5.73 GPa,0.35 GPa,213.5◦C,and 188.7℃,respectively,all superior to those of E-51/DDM(3.68 GPa,0.27 GPa,107.2℃,and 174.8℃),presenting potential application in high-heating electronic component packaging and printed circuit boards. 展开更多
关键词 epoxy resins fluorine-containing groups highly intrinsic thermal conductivity liquid crystal structure low dielectric constant
原文传递
Arbitrary and reconfigurable optical vortex generation:a high-efficiency technique using director-varying liquid crystal fork gratings 被引量:14
10
作者 Peng Chen Bing-Yan Wei +5 位作者 Wei Ji Shi-Jun Ge Wei Hu Fei Xu Vladimir Chigrinov Yan-Qing Lu 《Photonics Research》 SCIE EI 2015年第4期133-139,共7页
A high-efficiency technique for optical vortex(OV) generation is proposed and demonstrated. The technique is based on liquid crystal fork gratings with space-variant azimuthal orientations, which are locally controlle... A high-efficiency technique for optical vortex(OV) generation is proposed and demonstrated. The technique is based on liquid crystal fork gratings with space-variant azimuthal orientations, which are locally controlled via polarization-sensitive alignment layers. Thanks to the optical rewritability of the alignment agent and the dynamic image generation of the digital micro-mirror device, fork gratings can be instantly and arbitrarily reconfigured.Corresponding optical vortices carrying arbitrary azimuthal and radial indices are demonstrated with a conversion efficiency of 98.5%, exhibiting features of polarization control and electrical switching. The technique may pave a bright road toward OV generation, manipulation, and detection. 展开更多
关键词 FPG Arbitrary and reconfigurable optical vortex generation:a high-efficiency technique using director-varying liquid crystal fork gratings high
原文传递
Polymerization enabled reduction of the electrically induced birefringence change in nematic liquid crystals 被引量:1
11
作者 Jiahao Chen Chaoyi Li +3 位作者 Luyao Sun Lingling Ma Bingxiang Li Yanqing Lu 《Chinese Optics Letters》 SCIE EI CAS CSCD 2022年第2期172-176,共5页
Electric fields modify the optical properties of nematic liquid crystals(NLCs) by changing the nematic molecular orientation or order parameters, which enables electro-optic applications of NLCs. However, the field-in... Electric fields modify the optical properties of nematic liquid crystals(NLCs) by changing the nematic molecular orientation or order parameters, which enables electro-optic applications of NLCs. However, the field-induced optic change is undesirable in some cases. Here, we experimentally demonstrate that polymer stabilization weakens the birefringence change of NLCs caused by the nanosecond electrically modified order parameter effect. The birefringence change is reduced by 65% in the NLC doped with 25% reactive monomer, which is polymerized close to the nematic-to-isotropic phase transition. This technique could be used in liquid crystal devices where the birefringence change is unfavored. 展开更多
关键词 liquid crystal electro-optical response birefringence POLYMERIZATION
原文传递
Surface Anchoring Stabilized High Strength Disclinations in Smectic C Phase of a Schiff-base Liquid Crystal
12
作者 张其震 崔利 殷晓颖 《Chinese Journal of Chemistry》 SCIE CAS CSCD 2004年第9期1039-1044,共6页
The observation of disclination cores of high strength S=-2, -3, -4, -5, -6, -7, -8 in a smectic C phase of Schiff-base type liquid crystal (LC) is reported. The results of polarizing optical microscope (POM), dif-fer... The observation of disclination cores of high strength S=-2, -3, -4, -5, -6, -7, -8 in a smectic C phase of Schiff-base type liquid crystal (LC) is reported. The results of polarizing optical microscope (POM), dif-ferential scanning calorimetry (DSC) and wide-angle X-ray diffraction (WAXD) prove that the sample exhibits smectic C phase. It is suggested that the formation of the high strength disclination is mainly ascribed to the stronger anchoring of LC molecules on the substrate due to the formation of hydrogen bonds between the pendent hydroxyl of the LC molecule and the substrate. 展开更多
关键词 high strength disclination smectic liquid crystal hydrogen bond
原文传递
High Azimuthal Index Doughnut Beam Generated by Liquid Crystal Spiral Phase Plates
13
作者 Ping Shum 《光学学报》 EI CAS CSCD 北大核心 2003年第S1期859-860,共2页
A novel technique of producing azimuthal index 1>1 doughnut beam of good quality by use of multi-liquid crystal cells is presented, it has the advantages of high conversion efficiency and flexibility.
关键词 by as In high be THAN high Azimuthal Index Doughnut Beam Generated by liquid crystal Spiral Phase Plates in that LG of
原文传递
High damage threshold liquid crystal binary mask for laser beam shaping 被引量:2
14
作者 Gang Xia Wei Fan +3 位作者 Dajie Huang He Cheng Jiangtao Guo Xiaoqin Wang 《High Power Laser Science and Engineering》 SCIE CAS CSCD 2019年第1期68-73,共6页
In order to improve the damage threshold and enlarge the aperture of a laser beam shaper, photolithographic patterning technology is adopted to design a new type of liquid crystal binary mask. The inherent conductive ... In order to improve the damage threshold and enlarge the aperture of a laser beam shaper, photolithographic patterning technology is adopted to design a new type of liquid crystal binary mask. The inherent conductive metal layer of commercial liquid crystal electro-optical spatial light modulators is replaced by azobenzene-based photoalignment layers patterned by noncontact photolithography. Using the azobenzene-based photoalignment layer, a liquid crystal binary mask for beam shaping is fabricated. In addition, the shaping ability, damage threshold, write/erase flexibility and stability of the liquid crystal binary mask are tested. Using a 1 Hz near-IR(1064 nm) laser, the multiple-shot nanosecond damage threshold of the liquid crystal mask is measured to be higher than 15 J/cm^2. The damage threshold of the azobenzenebased photoalignment layer is higher than 50 J/cm^2 under the same testing conditions. 展开更多
关键词 high damage THRESHOLD laser beam SHAPER liquid crystal PHOTOALIGNMENT
原文传递
High energy and long pulse generation with high-birefringence photonic crystal fibre and laser-diode pumped regenerative amplifier
15
作者 王河林 王承 +2 位作者 冷雨欣 徐至展 候蓝田 《Chinese Physics B》 SCIE EI CAS CSCD 2010年第5期342-346,共5页
We report on the generation of a high energy and long pulse for pumping optical parametric chirped-pulse amplification (OPCPA) by a high-birefringence photonic crystal fibre (HB-PCF) and a laser-diode-pumped regen... We report on the generation of a high energy and long pulse for pumping optical parametric chirped-pulse amplification (OPCPA) by a high-birefringence photonic crystal fibre (HB-PCF) and a laser-diode-pumped regenerative chirped pulse amplifier. Using the femtosecond pump pulse centred at 815 nm, a 1064 nm soliton pulse is produced in the HB-PCF. After injecting it into an Nd:YAG regenerative amplifier with the glass etalons, a narrow-band amplified pulse with an energy of -4 mJ and a duration of 235 ps is achieved at a repetition rate of 10 Hz, which is suitable for being used as a pump source in the 800 nm OPCPA system. 展开更多
关键词 high-birefringence photonic crystal fibre high energy broad pulse regenerative amplification
下载PDF
Liquid crystalline texture and hydrogen bond on the thermal conductivities of intrinsic thermal conductive polymer films 被引量:5
16
作者 Ying Li Changdan Gong +4 位作者 Chenggong Li Kunpeng Ruan Chao Liu Huan Liu Junwei Gu 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2021年第23期250-256,共7页
Polymer-dispersed liquid crystal(PDLC)films comprising polyvinyl alcohol(PVA)and liquid crystal monomer(LCM)were successfully obtained by the method of solution casting&thermal compressing.LCM was distributed orde... Polymer-dispersed liquid crystal(PDLC)films comprising polyvinyl alcohol(PVA)and liquid crystal monomer(LCM)were successfully obtained by the method of solution casting&thermal compressing.LCM was distributed orderly in PVA matrix by hydrogen bond interaction,to form PVA-LCM interpe net rating-layered networks.When the mass fraction of LCM was up to 35 wt%,the corresponding in-plane thermal conductivity coefficient(λ//)of PDLC film was significantly increased to 1.41 W m^(-1)K^(-1),about 10.8 times that of neat PVA(0.13 W m^(-1)K^(-1)).High intrinsicλ//values of PDLC films were mainly attributed to the formed microscopic-ordered structures from ordered stacking of LCM,ordered arrangement of PVA chains,and their hydrogen bond interaction.This work would offer a new way to design and prepare novel intrinsic high thermal conductive polymers. 展开更多
关键词 liquid crystal monomer(LCM) Polyvinyl alcohol(PVA) Intrinsic high thermal conductivity Hydrogen bond interaction
原文传递
Temperature-dependent optical response of phase-only nematic liquid crystal on silicon devices 被引量:1
17
作者 张紫辰 Huan Xu +2 位作者 杨海宁 尤政 初大平 《Chinese Optics Letters》 SCIE EI CAS CSCD 2016年第11期85-89,共5页
Wavelength-dependent birefringence and dielectric anisotropy.two major optical properties of the nematie liquid crystal materials used in phase-only liquid crystal on silicon(LCOS) devices,are measured as a function... Wavelength-dependent birefringence and dielectric anisotropy.two major optical properties of the nematie liquid crystal materials used in phase-only liquid crystal on silicon(LCOS) devices,are measured as a function of operating temperatures.The dynamic phase modulation depth and threshold voltage of these phase-only LCOS devices are also measured in the corresponding temperature range and compared with theoretical predictions.The results show that the dynamic response time can he reduced significantly by an appropriate increase ol device operative temperature,while the necessary device elements,such as phase modulation depth and threshold voltage,can be maintained at the same time. 展开更多
关键词 birefringence Dielectric materials Display devices liquid crystals liquids Modulation Optical properties Phase modulation Threshold voltage
原文传递
Studies on the Technology and Mechanism of Laser Photoinduced Alignment of Liquid Crystal 被引量:1
18
作者 HE Yu e WANG Zhan qi and XIE Ming gui (Department of Chemistry, Sichuan University, Chengdu, 610064) CAI Bang wei and BI Guo jiang (Department of Opt Electronic & Science, Sichuan University, Chengdu, 610064) 《Chemical Research in Chinese Universities》 SCIE CAS CSCD 1998年第4期94-96,共3页
IntroductionTheanisotropyofliquidcrystalsmakesitpossibletobemadeintomanykindsofelec-tro-opticdevices.Whenthe... IntroductionTheanisotropyofliquidcrystalsmakesitpossibletobemadeintomanykindsofelec-tro-opticdevices.WhenthethicknessoftheLCc... 展开更多
关键词 liquid crystal(LC) Laser photoinduced alignment Polarization controller high power laser
下载PDF
Wideband, 50 dB Attenuation Range Liquid Crystal Based Variable Optical Attenuator
19
作者 J.J. Pan Henry He Eric Zhang 《光学学报》 EI CAS CSCD 北大核心 2003年第S1期-,共2页
A compact variable optical attenuator, covering C and L bands with over 50 dB attenuation range, is realized using a single liquid crystal cell with a tilted fused silica coating compensating the cell's small resi... A compact variable optical attenuator, covering C and L bands with over 50 dB attenuation range, is realized using a single liquid crystal cell with a tilted fused silica coating compensating the cell's small residual birefringence. 展开更多
关键词 VOA dB Attenuation Range liquid crystal Based Variable Optical Attenuator be WIDEBAND into with very of Figure LC that high
原文传递
Polarisation-sensitive four-wave mixing and soliton self-frequency shift effect in the highly birefringent photonic crystal fibre
20
作者 苑金辉 桑新柱 +4 位作者 余重秀 忻向军 李曙光 周桂耀 侯蓝田 《Chinese Physics B》 SCIE EI CAS CSCD 2010年第7期344-349,共6页
By adjusting the polarisation state of the pump at 805 nm parallel to slow (x) and fast (y) axes of the highly birefringent photonic crystal fibre with zero dispersion wavelengths 790 nm and 750 nm, this paper dem... By adjusting the polarisation state of the pump at 805 nm parallel to slow (x) and fast (y) axes of the highly birefringent photonic crystal fibre with zero dispersion wavelengths 790 nm and 750 nm, this paper demonstrates the efficient polarisation-sensitive four wave mixing involved in pump, anti-Stokes and Stokes signals and soliton self- frequency shift effects induced by the phase-matching between red-shifted solitons and blue-shifted dispersive waves. If the reduction of coupling efficiency to the circular pump laser mode or other circular fibres due to asymmetry of the core is neglected, more than 98% of the total input power is kept in a single linear polarisation. Controlled dispersion characteristic of the doublet of fundamental guided-modes results in achieving light field strongly confined in principal axes of photonic crystal fibre, and enhancing the corresponding nonlinear-optical process through the remarkable nonlinear birefringence. 展开更多
关键词 highly birefringent photonic crystal fibre four wave mixing soliton self-frequency shift PHASE-MATCHING
下载PDF
上一页 1 2 19 下一页 到第
使用帮助 返回顶部